The Arkansas River is a major
tributary of the
Mississippi River. It generally flows to the east and southeast as it traverses the U.S. states of
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
,
Kansas,
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
, and
Arkansas
Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the ...
. The river's source basin lies in the
western United States in Colorado, specifically the Arkansas River Valley. The headwaters derive from the
snowpack in the
Sawatch and
Mosquito mountain ranges. It flows east into the
Midwest
The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four Census Bureau Region, census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of ...
via Kansas, and finally into the
South
South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west.
Etymology
The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...
through Oklahoma and Arkansas.
At , it is the sixth-longest river in the
United States,
the second-longest tributary in the Mississippi–
Missouri system, and the
45th longest river in the world. Its origin is in the
Rocky Mountains in
Lake County, Colorado, near
Leadville. In 1859,
placer gold discovered in the Leadville area brought thousands seeking to strike it rich, but the easily recovered placer gold was quickly exhausted. The Arkansas River's mouth is at
Napoleon, Arkansas, and its drainage basin covers nearly .
[See ]watershed
Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to:
Hydrology
* Drainage divide, the line that separates neighbouring drainage basins
* Drainage basin, called a "watershe ...
maps
1
Its volume is much smaller than the Missouri and
Ohio rivers, with a mean discharge of about .
The Arkansas from its headwaters to the
100th meridian west
The meridian 100° west of the Prime Meridian of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 100th merid ...
formed part of the
U.S.–Mexico border from the
Adams–Onís Treaty
The Adams–Onís Treaty () of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty,Weeks, p.168. was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined t ...
(in force 1821) until the
Texas Annexation or
Treaty of Guadalupe Hidalgo.
Pronunciations
Name pronunciation varies by state. Generally, the river is pronounced in
Kansas, but in
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
,
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
, and
Arkansas
Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the ...
.
Physical geography
Course changes
The path of the Arkansas River has changed over time. Sediments from the river found in a
palaeochannel next to Nolan, a site in the
Tensas Basin, show that part of the river's meander belt flowed through up to 3200 BCE. While it was previously thought that this relict channel was active at the same time as another relict of
Mississippi River's meander belt, it has been shown that this channel of the Arkansas was inactive approximately 400 years before the Mississippi channel was active.
Hydrography

The Arkansas has three distinct sections in its long path through central North America. At its headwaters beginning near
Leadville,
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
, the Arkansas runs as a steep fast-flowing mountain river through the Rockies in its narrow valley, dropping in . This section supports extensive
whitewater rafting, including The Numbers (near
Granite, Colorado),
Brown's Canyon, and the
Royal Gorge.
At
Cañon City, Colorado
Cañon City is a home rule municipality that is the county seat and the most populous municipality of Fremont County, Colorado, United States. The city population was 17,141 at the 2020 United States Census. Cañon City is the principal city of t ...
, the Arkansas River valley widens and flattens markedly. Just west of
Pueblo, Colorado, the river enters the
Great Plains
The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, an ...
. Through the rest of
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
,
Kansas, and much of
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
, it is a typical Great Plains riverway, with wide, shallow banks subject to seasonal flooding and periods of dwindling flow. Tributaries include the
Cimarron and the
Salt Fork Arkansas rivers.
In eastern Oklahoma the river begins to widen further into a more contained consistent channel. To maintain more reliable flow rates, a series of dams and large reservoir lakes have been built on the Arkansas and its intersecting tributaries, including the
Canadian,
Verdigris,
Neosho (Grand),
Illinois, and
Poteau rivers.
[O'Dell, Larry]
''Encyclopedia of Oklahoma History and Culture''. "Arkansas River.
These locks and dams enable the river to be navigable by barges and large river craft downriver of
Muskogee, Oklahoma
Muskogee () is the thirteenth-largest city in Oklahoma and the county seat of Muskogee County. Home to Bacone College, it lies approximately southeast of Tulsa. The population of the city was 36,878 as of the 2020 census, a 6.0 percent decrease ...
, where the
McClellan-Kerr Arkansas River Navigation System joins the Verdigris River.
Into western
Arkansas
Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the ...
, the river path works between the encroaching
Boston
Boston (), officially the City of Boston, is the capital city, state capital and List of municipalities in Massachusetts, most populous city of the Commonwealth (U.S. state), Commonwealth of Massachusetts, as well as the cultural and financ ...
and
Ouachita mountains, including many isolated, flat-topped mesas, buttes, or
monadnock
An inselberg or monadnock () is an isolated rock hill, knob, ridge, or small mountain that rises abruptly from a gently sloping or virtually level surrounding plain.
In Southern Africa a similar formation of granite is known as a koppie, a ...
s such as
Mount Nebo,
Petit Jean Mountain, and
Mount Magazine, the highest point in the state. The river valley expands as it encounters much flatter land beginning just west of
Little Rock, Arkansas. It continues eastward across the plains and forests of eastern Arkansas until it flows into the
Mississippi River near
Napoleon, Arkansas.
Water flow in the Arkansas River (as measured in central
Kansas) has dropped from approximately average from 1944–1963 to average from 1984–2003, largely because of the pumping of
groundwater for
irrigation in eastern
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
and western
Kansas.
Important cities along the Arkansas River include
Canon City,
Pueblo,
La Junta
La Junta is a home rule municipality in , the county seat of, and the most populous municipality of Otero County, Colorado, United States. The city population was 7,322 at the 2020 United States Census. La Junta is located on the Arkansa ...
, and
Lamar, Colorado;
Garden City,
Dodge City, and
Wichita, Kansas;
Tulsa, Oklahoma; and
Fort Smith and
Little Rock, Arkansas.
The May 2002
I-40 bridge disaster took place on
I-40's crossing of
Kerr Reservoir on the Arkansas River near
Webbers Falls, Oklahoma.
Table of primary tributaries
Allocation problems
Since 1902, Kansas has claimed that Colorado takes too much of the river's water; it has filed numerous lawsuits over this issue in the
U.S. Supreme Court that continue to this day,
['' Kansas v. Colorado'' 514 U.S. 673 (1995), 185 U.S. 125 (1902)] generally under the name of ''
Kansas v. Colorado''. The problems over the possession and use of Arkansas River water by Colorado and Kansas led to the creation of an
interstate compact or agreement between the two states.
While Congress approved the Arkansas River Compact in 1949,
the compact did not stop further disputes by the two states over water rights to the river.
The Kansas–Oklahoma Arkansas River Basin Compact was created in 1965 to promote mutual consideration and equity over water use in the basin shared by those states. The Kansas–Oklahoma Arkansas River Commission was established, charged with administering the compact and reducing pollution. The compact was approved and implemented by both states in 1970, and has been in force since then.
Riverway commerce

The
McClellan–Kerr Arkansas River Navigation System begins at the
Tulsa Port of Catoosa on the
Verdigris River, enters the Arkansas River near Muskogee, and runs via an extensive lock and dam system to the Mississippi River. Through Oklahoma and Arkansas, dams which artificially deepen and widen the river to sustain commercial barge traffic and recreational use give the river the appearance of a series of reservoirs.
["McClellan-Kerr Arkansas River Navigation System 2016 Inland Waterway Fact Sheet"](_blank)
Oklahoma Department of Transportation. 2016. Accessed June 16, 2017.
The McClellan–Kerr Arkansas River Navigation System diverts from the Arkansas River upstream of the
Wilbur D. Mills Dam to avoid the long winding route which the lower Arkansas River follows. This circuitous portion of the Arkansas River between the Wilbur D. Mills Dam and the Mississippi River was historically bypassed by river vessels. Early steamboats instead followed a network of rivers—known as the Arkansas Post Canal—which flowed north of the lower Arkansas River and followed a shorter and more direct route to the Mississippi River. When the McClellan–Kerr Arkansas River Navigation System was constructed between 1963 and 1970, the Arkansas Post Canal was significantly improved, while the lower Arkansas River continued to be bypassed by commercial vessels.
In history

Many nations of
Native Americans lived near, or along, the 1,450-mile (2,334-km) stretch of the Arkansas River for thousands of years. The first Europeans to see the river were members of the
Spanish Coronado expedition on June 29, 1541. Also in the 1540s,
Hernando de Soto
Hernando de Soto (; ; 1500 – 21 May, 1542) was a Spanish explorer and '' conquistador'' who was involved in expeditions in Nicaragua and the Yucatan Peninsula. He played an important role in Francisco Pizarro's conquest of the Inca Empire ...
discovered the junction of the Arkansas with the Mississippi. The Spanish originally called the river ''Napeste''.
"The name "Arkansas" was first applied by French Father
Jacques Marquette, who called the river ''Akansa'' in his journal of 1673. The Joliet-Marquette expedition travelled the
Mississippi River from
Prairie du Chien, Wisconsin toward the Gulf of Mexico, but turned back at the mouth of the Arkansas River. By that time, they had encountered Native Americans carrying European trinkets, and feared confrontation with Spanish conquistadors.
Jean-Baptiste Bénard de la Harpe, a French trader, explorer and nobleman had led an expedition into what is now Oklahoma in 1718–19. His original objective was to establish a trading post near the present city of
Texarkana, Arkansas, but he extended his trip overland as far north as the Arkansas River (which he designated as the ''Alcansas''). The explorer wrote that he and nine other men, including three
Caddo
The Caddo people comprise the Caddo Nation of Oklahoma, a federally recognized tribe headquartered in Binger, Oklahoma. They speak the Caddo language.
The Caddo Confederacy was a network of Indigenous peoples of the Southeastern Woodlands, wh ...
guides and 22 horses loaded with trade goods, had come to a native settlement overlooking the river, where there were about 6,000 natives, who gave the strangers a warm welcome. La Harpe's party were honored with the
calumet ceremony and spent ten days at this location.
In 1988, evidence of a native village was discovered along the Arkansas River south of present-day
Tulsa, Oklahoma. By then, the site was known as the
Lasley Vore Site
The Lasley Vore Site is an archaeological site near the Arkansas River in Tulsa County, Oklahoma. Based on an archeological study in 1988 conducted by the University of Tulsa, this is believed to be the remains of a Wichita village of about 6,0 ...
.
[Odell, George H. "Lasley Vore Site." ''Encyclopedia of Oklahoma History and Culture''.](_blank)
Accessed January 26, 2017.
French traders and trappers who had opened up trade with Indian tribes in Canada and the areas around the Great Lakes began exploring the Mississippi and some of its northern tributaries. They soon learned that the birchbark canoes, which had served them so well on the northern waterways, were too light for use on southern rivers such as the Arkansas. They turned to making and using dugout canoes, which they called ''pirogues'', made by hollowing out the trunks of
cottonwood trees. Cottonwoods are plentiful along the streams of the southwest and grow to large sizes. The wood is soft and easily worked with the crude tools carried by both the French and Indians. The pirogues were sturdier and could be more useful to navigate the sandbars and snags of the Southern waterways.
[Wright, Muriel H. "Early Navigation and Commerce along the Arkansas and Red Rivers in Oklahoma." ''Chronicles of Oklahoma''. Volume 8, Number 1, March, 1930. p. 65.](_blank)
Accessed September 29, 2017.
In 1819, the
Adams–Onís Treaty
The Adams–Onís Treaty () of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty,Weeks, p.168. was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined t ...
set the Arkansas as part of the frontier between the United States and Spanish
Mexico. This continued until the United States annexed
Texas after the
Mexican–American War, in 1846. The treaty was made shortly after "Old Settler"
Cherokee were pushed out of Texas and moved to near what became known as
Webbers Falls on the Arkansas River. They planned to reunite with the Cherokee who had moved there on the Trail of Tears in 1839. That area, then part of
Arkansas Territory, would become
Indian Territory and later
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
.
This area had long been traditional territory of the
Osage The Osage Nation, a Native American tribe in the United States, is the source of most other terms containing the word "osage".
Osage can also refer to:
* Osage language, a Dhaegin language traditionally spoken by the Osage Nation
* Osage (Unicode b ...
. They resisted the new Native Americans moving in with armed conflict. The US encouraged a peace treaty made in 1828 but the territory issue was still unresolved by the time thousands of additional Cherokee refugees moved to the area during the
Trail of Tears.
By the time
Fort Smith was established in 1817, larger capacity watercraft became available to transport goods up and down the Arkansas. These included flatboats (''bateaus'') and
keelboats. Along with the pirogues, they transported piles of deer, bear, otter, beaver and buffalo skins up and down the river. Agricultural products such as corn, rice, dried peaches, beans, peanuts, snake root, sarsaparilla, and ginseng had grown in economic importance.
On March 31, 1820, the ''Comet'' became the first steamboat to successfully navigate part of the Arkansas River, reaching a place called
Arkansas Post
The Arkansas Post (french: Poste de Arkansea) (Spanish: ''Puesto de Arkansas''), formally the Arkansas Post National Memorial, was the first European settlement in the Mississippi Alluvial Plain and present-day U.S. state of Arkansas. In 168 ...
, about above the confluence of the Arkansas and the Mississippi rivers.
[U.S. Army Corps of Engineers, Little Rock District/ Mission/Navigation.](_blank)
Accessed June 2, 2017. In mid-April 1822, the ''Robert Thompson'', towing a keelboat, was the first steamboat to navigate the Arkansas as far as Fort Smith. For five years, Fort Smith was known as the head of navigation for steamboats on the river. It lost the title to Fort Gibson in April 1832, when three steamboats, ''Velocipede'', ''Scioto'' and ''Catawba'', all arrived at Fort Gibson later that month.
Later, the
Santa Fe Trail
The Santa Fe Trail was a 19th-century route through central North America that connected Franklin, Missouri, with Santa Fe, New Mexico. Pioneered in 1821 by William Becknell, who departed from the Boonslick region along the Missouri River, th ...
followed the Arkansas through much of Kansas, picking it up near
Great Bend and continuing through to
La Junta, Colorado
La Junta is a home rule municipality in , the county seat of, and the most populous municipality of Otero County, Colorado, United States. The city population was 7,322 at the 2020 United States Census. La Junta is located on the Arkansas Ri ...
. Some users elected to take the challenging
Cimarron Cutoff
The Santa Fe Trail was a 19th-century route through central North America that connected Franklin, Missouri, with Santa Fe, New Mexico. Pioneered in 1821 by William Becknell, who departed from the Boonslick region along the Missouri River, ...
starting at
Cimarron, Kansas.
American Civil War
During the American Civil War, each side tried to prevent the other from using the Arkansas River and its tributaries as a route for moving reinforcements. Initially, the Union Army abandoned its forts in the Indian Territory, including Fort Gibson and Fort Smith, in order to maximize its strength for campaigns elsewhere. The Confederate Army sent troops from Texas to support its Native American allies. Union troops returned to the area later in the war, after defeating the Confederates at the
Battle of Pea Ridge and the
Battle of Fort Smith. They began recovering the position it had previously abandoned, most notably Fort Gibson, and reopened the Arkansas River as a supply route. In September 1864, a body of Confederate irregulars led by General
Stand Watie
Brigadier-General Stand Watie ( chr, ᏕᎦᏔᎦ, translit=Degataga, lit=Stand firm; December 12, 1806September 9, 1871), also known as Standhope Uwatie, Tawkertawker, and Isaac S. Watie, was a Cherokee politician who served as the second princ ...
(Cherokee) successfully ambushed a Union supply ship bound for Fort Gibson. The vessel was destroyed, and a part of its cargo was looted by the Confederates.
Post Civil War
In the 1880s,
Charles "Buffalo" Jones
Charles Jesse Jones, known as "Buffalo Jones" (January 31, 1844 – October 1, 1919), was an American frontiersman, farmer, rancher, hunter, and conservationist. He cofounded Garden City, Kansas. He has been cited by the National Archives as one ...
, one of the cofounders of
Garden City, Kansas
Garden City is a city in, and the county seat of, Finney County, Kansas, United States. As of the 2020 United States census, 2020 census, the population of the city was 28,151. The city is home to Garden City Community College and the Lee Richa ...
, organized four irrigation companies to take water one hundred miles from the Arkansas River to cultivate of land. By 1890, water from the Arkansas was being used to irrigate more than of farmland in Kansas. By 1910, irrigation projects in Colorado had caused the river to stop flowing in July and August.
["History of the Arkansas River (1540 to 2000)". South Central Service Cooperative. 2017.](_blank)
Accessed June 4, 2017.
Flooding in 1927 severely damaged or destroyed nearly every levee downstream of Fort Smith, and led to the development of the Arkansas River Flood Control Association.
It also resulted in the Federal government assigning responsibility of flood control and navigation on the Arkansas river to the
U.S. Army Corps of Engineers (USACOE).
Angling
The headwaters of the Arkansas River in central
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
have been known for exceptional trout fishing, particularly
fly fishing
Fly fishing is an angling method that uses a light-weight lure—called an artificial fly—to catch fish. The fly is cast using a fly rod, reel, and specialized weighted line. The light weight requires casting techniques significantly diffe ...
, since the 19th century, when
greenback cutthroat trout dominated the river. Today,
brown trout
The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...
dominate the river, which also contains
rainbow trout
The rainbow trout (''Oncorhynchus mykiss'') is a species of trout native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead (sometimes called "steelhead trout") is an anadromous (sea-run) form of the coasta ...
. ''
Trout Unlimited'' considers the Arkansas one of the top 100 trout streams in America, a reputation the river has had since the 1950s. From Leadville to Pueblo, the Arkansas River is serviced by numerous fly shops and guides operating in Buena Vista, Salida, Cañon City and Pueblo. The Colorado Division of Wildlife provides regular online fishing reports for the river.
A
fish kill
The term fish kill, known also as fish die-off, refers to a localized die-off of fish populations which may also be associated with more generalized mortality of aquatic life.University of Florida. Gainesville, FL (2005) ''Plant Management in Fl ...
occurred on December 29, 2010, in which an estimated 100,000
freshwater drum lined the Arkansas River
bank.
An investigation, conducted by the Arkansas Game and Fish Commission, found the dead fish "... cover of river from the Ozark Lock and Dam downstream to River Mile 240, directly south of
Hartman, Arkansas."
Tests later indicated the likely cause of the kill was gas bubble trauma caused by opening the spillways on the Ozark Dam.
Image gallery
Notes
See also
*
Ackerman Island
* ''
Kansas v. Colorado''
*
List of crossings of the Arkansas River
This is a list of bridges and other crossings of the Arkansas River starting from the mouth at the Mississippi River upstream to its source in Colorado.
Crossings
See also
* List of crossings of the Lower Mississippi River
* McClellan� ...
*
List of longest rivers of the United States (by main stem)
* Listing of rivers for each state:
Colorado
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...
,
Kansas,
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
,
Arkansas
Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the ...
*
McClellan–Kerr Arkansas River Navigation System
References
External links
Colorado-Kansas Arkansas River Compact
Friends of the Arkansas RiverAquifer saturation mapfor ''Equus Beds
Aquifer Recharge Project''
Arkansas River CoalitionFull Scale MapSanta Fe Trail ResearchWichita Water Center Toursof navigation system
*
ttps://web.archive.org/web/20121024013411/http://www.library.okstate.edu/okmaps/ Oklahoma Digital Maps: Digital Collections of Oklahoma and Indian Territory*
*
* Arkansas River is discussed at the end of this article.
*
{{Authority control
Rivers of Arkansas
Rivers of Colorado
Rivers of Kansas
Rivers of Oklahoma
Tributaries of the Mississippi River
Regions of Arkansas
Rivers of Edwards County, Kansas
Rivers of Desha County, Arkansas
Rivers of Arkansas County, Arkansas
Rivers of Lincoln County, Arkansas
Rivers of Jefferson County, Arkansas
Rivers of Pulaski County, Arkansas
Rivers of Faulkner County, Arkansas
Rivers of Perry County, Arkansas
Rivers of Conway County, Arkansas
Rivers of Pope County, Arkansas
Rivers of Yell County, Arkansas
Rivers of Logan County, Arkansas
Rivers of Johnson County, Arkansas
Rivers of Franklin County, Arkansas
Rivers of Crawford County, Arkansas
Rivers of Sebastian County, Arkansas
Rivers of Fremont County, Colorado
Rivers of Sedgwick County, Kansas
Geography of Tulsa, Oklahoma
Rivers of Ford County, Kansas
Rivers of Hamilton County, Kansas
Rivers of Reno County, Kansas
Rivers of Rice County, Kansas
Rivers of Bent County, Colorado
Rivers of Pueblo County, Colorado
Mississippi River watershed